Title? I don't need no stinkin' title.
Have you never told a DM "Hey Insert Name, if you change this then that kinda breaks. You know that right?"
Let's take a real world example because hypotheticals don't always work. How DMs run shield master and the ability to shove someone varies. So if I have (or plan to take) shield master I'll ask the DM how they run it. So, yes, if they say that it can only be used after the attack is fully complete I'll explain why I think that for me it's no longer worth taking but I'll accept their ruling.
I guess I just see a fine line between asking how something works and telling them they're doing it wrong. To me, " if you change this then that kinda breaks. You know that right?" feels like I'm telling the DM that they're doing it wrong.